[bug fixs]
- TDIS-6380, To show and hide a div when receiving scrolling event from iframe to enforce the content refresh.
- Fixed a css error.
Merge pull request #238 from jacobchen/next

[bug fixs] TDIS-6380
[bug fixs] TDIS-5618, Changed to use define getter to protect the battery object.
Merge pull request #239 from jacobchen/next

[bug fixs] TDIS-5618, Changed to use define getter to protect the batter...
bugfix for RC7
return string for status
throw correct error ID in systeminfo
[Bug fixs] TDIS-6116, TDIS-6117, trigger one time of sensor event when application call add event listener.
Merge pull request #240 from jacobchen/next

[Bug fixs] TDIS-6116, TDIS-6117, trigger one time of sensor event when a...
[Calendar] fix bug: failed to find canlendar

* If there is no calendar items exist, we shouldn't let engine to
  extract any more
Merge pull request #241 from xuzhang/dev

[Calendar] fix bug: fail to find filter
[bug fix] TDIS-5641 return correct WebAPIException
[bug fix] TDIS-5394, 5393 added argument type checking.
lint
[bug fix] TDIS-5851, 5853 - type checking enhancement in callhistory